<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>my html</title>
    <script type="text/javascript" src="js/jquery.min.js"></script>
    <style type="text/css">
        #all{
            width: 100%;
            height: 100%;
            background: url("img/2f1a99c6cdd9b53f7eaf4f62044749e9.jpg") center;

        }
        .one{
            color: chartreuse;
            text-align: center;
        }
    </style>
</head>
<body>
    <div id="all">
        <div class="one">
            <h1>我的小可爱</h1>
        </div>

    </div>
</body>
</html>